# #华氏温度转成摄氏度 一位小数
# hua = float(input())
# she = float((hua - 32) / 1.8)
# print('%.1f华氏度 = %.1f摄氏度' % (hua, she))
#
#
#
# import math
# pi = (math.pi)
# radius = float(input())
# area = pi * radius**2
# perimeter = 2 * pi * radius
# print('面积：%.1f' % area)
# print('周长：%.1f' % perimeter)




# a = int(input())
# if (a % 4 == 0 and a % 100 != 0 or a % 400 == 0):
#     print("这是闰年")
# else:
#     print("这不是闰年")





# username = '123456'
# password = '123456'
# x = str(input())
# y = str(input())
# if (x == username and y==password):
#     print("登录成功")
# else:
#     print("登录失败")